Also available are the sicp-video-lectures, a series of lectures given to employees at HP. The lectures were filmed before the 2nd edition of the book, so some of the examples are different, but this is an invaluable resource.
There is a map between the 2nd edition of the book and the videos: sicp-text-to-video-map.

This is not necessarily a book about Scheme (though, you will learn scheme in it), but more about programming in general, and its processes. This book will not only make you a better scheme programmer, but it will make you a better programmer in general.

Virtual Study Group

There is a Virtual Study Group found at groups.yahoo.com/group/sicp-vsg/ that rather dormant save for spam (as of Dec 2007). Also there is an IRC channel found on freenode called #sicp. (Note: The IRC channel is empty as of 2009-11-11.) This channel is logged on meme.b9.com. SICP-Solutions is the page where you can post solutions to problems in the book.

Implementation Specific Considerations

(runtime) primitive

Around exercise 1.20, you'll need a "(runtime)" primitive. Not every implementation has it. You can use the following equivalent functions: